Conclusion of a Veneration service

Yoan

Hi,

I'm a bit confused about how we should end a Veneration service.

If we look at Coptic Reader, it should be

- Conclusion of the Watos Theotokia starting from "O our Lord, Jesus Christ"

- End this conclusion with

* O Lord hear us...

* 3 Lord have mercy

If we look at Tasbeha.org and Coptic Heritage, it should be

- Intercede on our behalf... / Pray to the Lord... based on the Saints of the Church in the tune of the Conclusion of the Watos Theotokia

- Conclusion of the Watos Theotokia starting from "O angel of this day/night"

- End this conclusion with only

* 3 Lord have mercy

If we look at a veneration service prayed by Ibrahim Ayad, he does

- Conclusion of the Watos Theotokia starting from "O angel of this day/night"

- End this conclusion with

* O Lord hear us... (Coptic)

* O Lord hear us... (Arabic)

I know time management is a factor for some services, but if we exclude this factor, what should be the correct rite?

Yoan.